<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>箭头函数</title>
    <script>

        let print2 = obj => console.log(obj);
        print2(1);
        let sum2 = (a,b) =>console.log(a+b);
        sum2(2,3);


    </script>
</head>
<body>

</body>
</html>